Authorities in Colombia have been fighting an effective battle against drug traffickers. Police have confiscated thousands of assets for use as evidence in court. But John Otis reports from Bogota that keeping track of everything has proved impossible.

Authorities in Colombia have been fighting an effective battle against drug traffickers. Police have confiscated thousands of assets for use as evidence in court. But John Otis reports from Bogota that keeping track of everything has proved impossible.

Authorities in Colombia have been fighting an effective battle against drug traffickers. Police have confiscated thousands of assets for use as evidence in court. But John Otis reports from Bogota that keeping track of everything has proved impossible.